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很多国家都加大了对海底天然气水合物的勘探和研究的力度。对于海底天然气水合物的勘探除了进行BSR物理探测以外,最直接的证据就是进行海底钻探取样。但是在海洋钻探过程中,海底水合物的分解容易引起钻探事故,其勘探和开采难度大,成为科学研究的难点。为此,人工合成了甲烷水合物,并应用微型钻井系统模拟海底天然气水合物钻井过程,研究了在钻井过程中水合物的分解特性。在微型钻井过程中,对几种不同性质的钻井液对水合物分解特性的影响进行了对比分析,研究结果对海底天然气水合物钻探取样具有重要的参考价值。
Many countries have stepped up their efforts to explore and study gas hydrates on the seabed. The most direct proof of submarine gas hydrate exploration other than physical BSR exploration is submarine drilling sampling. However, in the process of marine drilling, the decomposition of seabed hydrate easily lead to drilling accidents, and its exploration and exploitation are difficult and become a scientific research difficulty. Therefore, methane hydrate was artificially synthesized, and the micro-drilling system was used to simulate the process of submarine gas hydrate drilling, and the hydrate decomposition characteristics during drilling were studied. In the process of micro-drilling, the effects of several different drilling fluids on the decomposition characteristics of hydrates are comparatively analyzed. The results of the study are of important reference value for the sampling of submarine gas hydrate drilling.